Ring-forming apparatus.



H. HEINRICH.

RING FORMING APPARATUS.

APPLIOATION rum) 1111.17, 1912.

1,105,560. Patented July 28,1914

8 I Z f/ @X3i/bmw SMQ/who@ HENRY HENRICH, OF NEW YORK, N. Y.

RING-FOR1VIING APPARATUS.

Specification of Letters Patent.

PatentedJuly 2S, 1914.

Application filed January 17, 1912. Serial No. 671,664.

To all whom it may concern Be it known that I, HENRY HENRICH, of New York, in the county of New York, and in the State of New York, have invented certain new and useful Improvements in Ring-Forming Apparatus, and do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates particularly to the provision of dies of a certain character and apparatus used in connection therewith.

The object of my invention is to simplify the construction of apparatus used for forming rings, to make it stronger and to provide means for insuring that the central opening in the formed blank is perfectly cylindrical.

Further objects of my invention are to provide an apparatus in which a blank can be formed having its upper and lower edges rounded and in which the blank can be formed without danger of breaking the dies.

Still a further object of my invention is to provide a means whereby the formed blank may be readily removed from the male die.

I have shown one form of my invention in the accompanying drawings, in which- Figure 1 is a vertical section of the apparatus used for forming the ring blank in the irst operation; Fig. 2 is a vertical cross-section of the apparatus used for forming the ring blank in the last stages; Fig. 3 is a vertical section of the blank from which the ring is formed; Fig. 4 is an elevation of the ring blank after it has passed through the first forming operation; Fig. 5 is an elevation of the same showing the ring blank after it has passed through the second operation; and Fig. 6 is an elevation of the linger ring blank ready for rolling.

In the drawings, 1 represents a metal base. The base 1 has two slots 2 to receive bolts or other means for attaching the base to a sup port. At the center of said base there is a raised portion 3 having a central opening 4;. The base l has a cylindrical opening l of small size extending entirely through the base, which opening has at its upper end an annular shoulder 4b. In the first and second stages of the formation of the finger ring blank an apparatus such as that shown in Fig. 1 is used. In this ligure I have shown a female die 5 located in the opening 1. This die has a conical ope-ning 6 in its center and located near the top thereof, which opening communicates with a cylindrical opening 7 at the bottom of the die. The raised portion is provided with a sliding block 8 which is rendered adjustable by means of a screw 9, the purpose of which is to tighten the female die 5 in place. A male die or punch 10 is used in the apparatus shown in Fig. 1. This die comprises a shank 11 which is adapted to be attached to and operated by any suitable mechanism. The lower end of the male die 1() comprises a cylindrical extension 12 adjacent to a shoulder 13. Above the shoulder 13 there is located a cylindrical portion 14 of larger size, and above this the male die carries a screwthread 15 immediately above which there is located a. cylindrical flange 16. The male die 10 is provided over the screw-thread 15 with a sleeve 17 having a fiat shoulder 18 on its lower end and a handle 19. As shown in Fig. 1, the sleeve 17 is normally screwed upwardly against the shoulder 16, owing to the influence of a spring 20, one end of which is attached to the handle 19 and the other end of which is attached to any suitable portion of the operating ma chine, such, for example, as the portion which is attached to the shank 11. After the blank has been formed in the apparatus shown in Fig. 1, it is then subjected to an apparatus such as that shown in Fig. 2. This comprises the base 1 and a female die 21 having a circular depression 22 in the center of which there is located a conical opening 23, at the lower end of which there is a shoulder 24. Between the conical portion 23 and the shoulder 211 there is a curved. surface 25 to give the formed blank rounded edges. A cylindrical opening 26 passes from the conical opening entirely through the female die 21. In connection with this apparatus, I make use of a cylindrical pin 27 which is adapted to be maintained in 'the center of the conical opening 23 by means of a spring-pressed plunger 28 normally scribed, I' use an upper female die 1being equipped with the parts as pressed upwardly by means of a which is carried in a bari-el flange 3l at its upper end torest shoulder 4b.' The plunger Z8 has `l`t its i per end a flange 'te linlit :novenr of the spring 29 at one end thereof, ait-:l l interior of the barrel 30 is provided with flange 33 at its lower end to limit th f more ment of the springr at its lower end. Sal. is screw-threaded to the lower spring-pressed plunger 28 to prev be-ing withdrawn from the barrel connection with the female die almnly t sin-ius" f3@ S I k an opening 36 exactly corresponuing in yshape with the conical 'opening 23. 'l'he diameter of the upper female die 35 is such i to t within the circular depression l the lower female die, so as to give the parte a proper relative position.

ln the operation of the devicej the base l shown in Fig. l, a blank 37 in the shape of a washer and made, for example, of gold alloy, is inserted over the lower cylindrical portion of the male die l0 until it rests against the shoulder 13. The male die l() is then lon7v ered by any suitable mechanism, thereby forcing the blank 37 into the conical open ing 6 of the female die. ln this stage of the 'formation of theblanlnthe upper edge of the formed blank is caused to rest the shoulder 18 of they sleeve 17 is forced downwardly in the conical opening t? by reason of this fact. It willbe noted, however, that the lower edge of the formed blank is not forced against any shoulder or abutment of any kind, consequently, there is no danger of the dies being broken. Te blank is, as a result, given a form like l, blank 38 shown in Fig# 4. rlhis blank then turned upside down and formed again in the same apparatus. The blank thus. formed has now been given the shape of the blank 39 shown in Fig. 5. Art the en et' each of these forming operations the formed blank adheres closely to the stein of the reale die l() but the blank is readily removed from said die by turning the sleeve l? a portion of a revolution, so as to loosen the blanl; upon said die. `When the blank has bee-` removed in this manner and the handle l has been released, the sleeve l? returns to its normal position under the inlluence of the spring 20, and other blanks can l; through the saine forming operation w the necessity of adjustments. After blank has been formed in the manner scribedJ it is placed in the apparatus sho` in Fig. 2 between the two female dl aneL 35. The conical surfaces in the two dies act as wedging surfaces, always f the ring blank toward the center, tl Y avoiding bulging and invariably proa..

led in Fig. G having a middle of the ring t the top and bottom the blank rounded sequently forming t machine or turning ,ch s, r to reduce angular is A.n the last stage of the on the blank, the cylindrical pin rily removed with the blank from in.: rcs tightly to the pin and said pm is itinoifel" from the ring subsequently isi. auv convenient` manner.

have described my invention l wish it to be understood el nges may be made therein 'parting iin'cntirm which is el a i n1 l claim:

l. ln a ring forming apparatus, two fefrom the spirit of my set forth in the appended n. e J each having a conical forming surface u a cylindrical center pin.

SE. forming apparatus, two fe- A having a conical forming surf Y, a cylindrical removable center pin. iring forming apparatus,ftwo fef ,ql y

11 cylindrical-center pin, and a support for the center pin-' ring forming apparatus, twozfemale dies each having a conical forming survlindrical removable center pinJ and import for the center pin.

g :Farming apparatus, two feand a cylindrical center pin, each i having a forming surface in the cone and a plane connected by a curi/'eel surface.

.spring v. ln a ring forming apparatus, two female dies and a cylindrical removable center pin, each of said dies having a forming surface in the shape of a cone and a plane connected a curved surface.

7. ln ring forming apparatus, two fe nale dies, cylindrical center pin, and a support for the center pin, each of i dies having a forming surface in the ape of cone and a plane connected by. a

support for the center pin, having a forming surface i cone and a plane connected ring forming apparatus, two fea cvllndrical removable center pin,

ies each'having conical forming surx each of said dies having a forming surface In testimony that I claim the foregoing I in the shape of a cone and a plane connected have hereunto set my hand.

by a curved surface, the conical surfaces be- HENRY HENRlCH. ing located with their bases adjacent to each vWitnesses:

other and the planes being located at the J. FREUDENVOLL,

narrow portions of the cones. ARTHUR WRIGHT.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

